The unanimous vote by the LA County Board of Supervisors today ends a seven-year public hearing and environmental approval process that clears the way to begin construction on NBCUniversal‘s 25-year Evolution Plan. Starting in late summer, work will begin on The Wizarding World of Harry Potter themed land at Universal Studios Hollywood theme park, as well as on new and upgraded TV production facilities, office space and infrastructure on the Universal Studios lot. The Potter attraction was first announced in 2011 and already has seen success in Universal’s Orlando theme park, which Universal President and COO Ron Meyer has called a game-changer. A Harry Potter attraction at Universal Studios Japan was announced last year. Originally, the broader Evolution Plan to build 3,000 apartments and condos and retail space on the studio back lot were scrapped in July, after Yaroslovsky and LA City Council member Tom LaBonge red-flagged the potential environmental impact and potential loss of production jobs. (Universal Studios sits on both LA city and county land; the LA City Council approved the city’s portion of the plan in February.)

In total, the plan is expected to create more than 30,000 jobs and generate $2 billion in economic activity, according to NBCU. County supervisor Zev Yaroslavsky said the newly forged agreement calls for NBCU to make $100 million in transit improvements, and commit nearly $14 million to jump-start the effort to revitalize the Los Angeles River by “completing key missing links on the LA River bike path”. That includes building a nearly one-acre trailhead park on the studio’s property abutting the river. Here’s NBCU’s release on the deal:

UNIVERSAL CITY, California, April 23, 2013 – NBCUniversal announced today plans to begin construction of the first projects of its 25-year Evolution Plan. The Evolution Plan represents a $1.6 billion investment in tourism and production. This long-term investment in two industries that are vital to Los Angeles will create more than 30,000 jobs and generate $2 billion of economic activity during operations for the region.

“After nearly a decade of work on the Evolution Plan, today’s vote sets the stage for our next 100 years in Los Angeles,” said Ron Meyer, president and COO of Universal Studios. “We are thankful for the support and leadership we have received from both the County and City of Los Angeles and are ready to get started investing in these important tourism and production projects in the next few months.”

Starting in late summer, NBCUniversal will begin construction of The Wizarding World of Harry Potter themed land at Universal Studios Hollywood theme park, as well as new and upgraded television production facilities, office space and infrastructure on the Universal Studios lot. These projects represent a nearly $500 million investment in the Los Angeles economy and the creation of more than 2,000 construction jobs alone.

“We thank Los Angeles County Supervisor Zev Yaroslavsky, the entire Board of Supervisors, and County staff for providing us the path to bring much needed jobs and investment to Los Angeles,” said Corinne Verdery, Chief Real Estate Development and Planning Officer, NBCUniversal. “The working relationship we have built with the community was invaluable in developing our future plan and we are grateful to our nearly 7,500 supporters and union partners who have been with us every step of the way. We look forward to bringing The Wizarding World of Harry Potter to Hollywood, forever changing the face of tourism in Los Angeles.”

The Wizarding World of Harry Potter at Universal Studios Hollywood will be a fully immersive experience for the entire family designed to bring the Harry Potter fiction and films to life with impeccable detail and authenticity. Similar to the dynamic Universal Orlando Resort themed land that opened in 2010, the Hollywood experience will be faithful to the visual landscape of the fiction and films, including Hogwarts castle that will serve as the centerpiece of the impressively themed environment. The Wizarding World of Harry Potter is a collaboration between Warner Bros. Entertainment and Universal Parks and Resorts.

On the Universal Studios lot, NBCUniversal will upgrade existing production facilities and add new capabilities to better respond to the needs of television production. In addition, NBCUniversal is looking to create modern offices that will house everything from post-production services to traditional office space.